Question

A metal rod of length l and cross-sectional area a is heated through t c. What is the force required to prevent the expansion of the rod lengthwise? [y = youngs modulus of the material of rod, = coefficient of linear expansion

Answer 1

The force required to prevent the expansion of the rod lengthwise is

F = YAαt

Explanation:

We know that

Young's modulus "Y" = F.L/ AΔl ----- (1)

Δl = αlt   -----(2)

F = YAαlt / L

F = YAαt

Hence the force required to prevent the expansion of the rod lengthwise is

F = YAαt

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Question 9. 1. A steel wire of length 4.7 m and cross-sectional area 3.0 x 10-5 m2stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 x 10-5 m2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper?​

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Answer 2

Explanation:

Answer:CCC (2-chloroethyltrirnethyl ammonium chloride) a synthetic plant grorvth retardant , has been pleviously founcl to increase the ...